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piston ring /ˈpɪstən ˈɹɪŋ/ n

中文：活塞环

中文 · 活塞环Español · segmentoFrançais · segmentDeutsch · Kolbenring
Meaning：Circular ring mounted on the piston providing a seal between it and the cylinder.
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Gasoline engine Mono-metal piston with windows

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